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I use a large old prescription plastic jar.
Glass is not really a good idea because it doesn't show up on x-rays in the unlike event of a problem. The glass jar will contain the pressure much longer than the plastic will. This would create a larger boom rather than a loud boom with a lot of fire
I have also used the zip loc food containers. The small throw away ones. Those work great too. They have a really large opening for the scooper.

1oz may not last long. It also depends on how much you're using for each charge. A gram or two for each flight, then you're golden.

I use 1 mL micro centrifuge tubes with screw on tops. With these I pre-measure 1/2, 1, and 2 gram loads.Then I don't have to weigh it on the field. Just unscrew the top and use what I need. I tend to carry about 50g in my range box this way.

I use a large old prescription plastic jar.
Glass is not really a good idea because it doesn't show up on x-rays in the unlike event of a problem. The glass jar will contain the pressure much longer than the plastic will. This would create a larger boom rather than a loud boom with a lot of fire
I have also used the zip loc food containers. The small throw away ones. Those work great too. They have a really large opening for the scooper.

1oz may not last long. It also depends on how much you're using for each charge. A gram or two for each flight, then you're golden.

the glass jar wont contain any more pressure since the stopper would come right out. you are dead on with the x-ray thing.. hey doc whats this bump!, i dunnoo... for my 1oz, usualy having 20-40grams of BP, i am never worried.
it can actualy focus light inside the jar. so dont leave it out in the sun either...
I suggest using whats free, lot of guys use medicine bottles...

Ziploc containers- thats a great suggestion, it's amazing how its easy to overlook a good solution..

"Dad, I am going to put a big motor in this skinny rocket... its going to disapear like a ghost!!!.....

35mm what?
what's film?(just playing)
All the cameras I have are digital.

Those canisters work great also.

ClayD.
The glass jars I was talking about have a twist top like a glass jelly jar but smaller. I believe those will build up more pressure. Granted for a micro sec. but it's micro sec.'s longer than the plastic.

I keep a perscription pill bottle with 25g or so in the ammo can. I also refill the containers that come with Aerotech HP reloads. I pre-measure for what I need and have a dozen or two in the range box.

I know a number of people that use the powder containers/measure that muzzleloaders use.